from pydantic import BaseModel, Field
from app.models.base_class import Base
from sqlalchemy.orm import Mapped, mapped_column, Session, relationship
from sqlalchemy import ForeignKey, Integer, VARCHAR, Float, Enum

class OperatingExpensesBase(BaseModel):
    
    operating_id : int | None = Field(default=None)
    operating_expenses_type : str | None = Field(default=None)
    percentage_of_sales_per_year : float | None = Field(default=None)
    remark : str | None = Field(default=None)
    store_format_type : str | None = Field(default=None)
    group_id : int | None = Field(default=None)


class TblOperatingExpenses(Base):
    __tablename__ = "tbl_operating_expenses"
    operating_id : Mapped[int] = mapped_column("operating_id", Integer, primary_key=True, autoincrement=True)
    operating_expenses_type : Mapped[str] = mapped_column("operating_expenses_type", Enum("Maintenance and Repairs","Admin Overheads"))
    percentage_of_sales_per_year : Mapped[float] = mapped_column("percentage_of_sales_per_year", Float, nullable=True, server_default=None)
    remark : Mapped[str] = mapped_column("remark", VARCHAR(255), nullable=True, server_default=None)
    store_format_type : Mapped[str] = mapped_column("store_format_type", Enum("Store Format A","Store Format B"))
    group_id : Mapped[int] = mapped_column("group_id", ForeignKey("tbl_group.group_id"))
    
    group = relationship("TblGroup", back_populates="operating_expenses")
    
    @classmethod
    def create_operating_expenses(cls, data:OperatingExpensesBase, db:Session) ->"TblOperatingExpenses":
        data_dict = data.model_dump()
        new_data = cls(**data_dict)
        db.add(new_data)
        db.flush()
        return new_data
    
    @classmethod
    def get_operating_expenses(cls, group_id:int, db:Session) ->"TblOperatingExpenses":
        get_data = db.query(cls).filter(cls.group_id == group_id).all()
        return get_data
    
    @classmethod
    def update_operating_expenses(cls, operating_update_id:int, data:OperatingExpensesBase, db:Session) ->"TblOperatingExpenses":
        update_data = db.query(cls).filter(cls.operating_id == operating_update_id).first()
        data_dict = data.model_dump()
        for key, value in data_dict.items():
            if value is not None:
                setattr(update_data, key, value)
        db.commit()
        db.refresh(update_data)
        return update_data
    
    @classmethod
    def delete_operatin_expenses(cls, operating_id:int, db:Session) ->"TblOperatingExpenses":
        delete_data = db.query(cls).filter(cls.operating_id == operating_id).first()
        if not delete_data:
            return False
        db.delete(delete_data)
        db.commit()
        return True